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http://www.lenntech.com/Periodic-chart-elements/Ti-en.htm#Health%20effects%20of%20titanium

http://www.webelements.com/webelements/scholar/elements/titanium/history.html

http://www.itponline.com/index_files/AboutITP.htm

http://www.titaniumllc.com/history_of_titanium.htm

http://images.google.com/imgres?imgurl=http://web1.caryacademy.org/chemistry/rushin/StudentProjects/ElementWebSites/titanium/structure.gif&imgrefurl=http://web1.caryacademy.org/chemistry/rushin/StudentProjects/ElementWebSites/titanium/specificinfopage.htm&h=275&w=277&sz=13&hl=en&start=2&um=1&tbnid=1fscPMj0Aa4BnM:&tbnh=113&tbnw=114&prev=/images%3Fq%3DTitanium%2BElement%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DG